Abbreviations and Technical Terms
73
E.164
Standardized call numbers according to the ITU’s international numbering
plan with up to 15 digits. Usually composed of the parts:
C
ountry
C
ode
(CC),
N
ational
D
estination
C
ode (NDC) and
S
ubscriber
N
umber (SN).
EPID
Abbreviation of
E
nd
P
oint
ID
entifier. Hardware address of an incoming
message.
FTP
Abbreviation of "
F
ile
T
ransfer
P
rotocol."
Used for transferring files in networks to update telephone software,
for example (
Æ
Download Firmware).
G.711
Audio protocol for uncompressed voice transmission. Requires a band-
width of 64 Kbps.
G.722
Audio protocol for uncompressed voice transmission. Requires a band-
width of 64 Kbps.
G.723
Audio protocol for compressed voice transmission. The quality is poorer
than
Æ
G.711 and
Æ
G.729. Requires a bandwidth of 6 Kbps.
G.729
Audio protocol for compressed voice transmission. The quality is poorer
than
Æ
G.711 and better than
Æ
G.723. Requires a bandwidth of 8 Kbps.
Gatekeeper
A gatekeeper is a logical
Æ
H.323 Standard component which can be im-
plemented as Windows or UNIX software, as a router option, as part of an
Æ
MCU or a
Æ
Gateway.
Gateway
A system (computer or board) that transfers data between different net-
works. Gateways coordinate different protocols as appropriate,
for example,
Æ
IP network and ISDN network. A gateway can contain a
Æ
Router at the same time.
